ASM Community

Hello folks!
I'm doing some experiments with Fasm, but in my first try I had the following problem:

format PE GUI 4.0
entry start

include 'include\win32a.inc'

;---------------
;secao de dados
;---------------
section '.1' data readable writeable

	DumbString db "Hello world!",0
	DumbTitle db "Dumb Title",0
	
;---------------
;secao de codigo
;---------------
section '.2' code readable executable
	
	start:
		push 0
		push DumbTitle
		push DumbString
		push 0
		call MessageBoxA
				
		push 0
		call ExitProcess
		
;---------------
;tabela de importacao		
;---------------
section '.3' import data readable writeable
		
		library Kernel32,'Kernel32.dll'
		library User32,'User32.dll'
		
		import User32,MessageBoxA,'MessageBoxA'
		import Kernel32,ExitProcess,'ExitProcess'

The above code compiles without error or warning but it gives a GPF when I run it. I debugged it with Ollydbg to see what was wrong and I saw the following:

00402000 > $ 6A 00          PUSH 0
00402002   . 68 0F104000    PUSH silvio.0040100F                     ;  ASCII "Dumb Title"
00402007   . 68 00104000    PUSH silvio.00401000                     ;  ASCII "Hello world!"
0040200C   . 6A 00          PUSH 0
0040200E   . E8 5D100000    CALL silvio.00403070
00402013   . 6A 00          PUSH 0
00402015   . E8 74100000    CALL <&Kernel32.ExitProcess>

Whell the MessageBoxA api wasn't compiled correctly.
Is it a bug in fasm?

Thank you very much friend!
Now it works